Messages in this thread | | | Date | Fri, 11 Aug 2006 11:46:31 -0700 | From | Andrew Morton <> | Subject | Re: cpufreq stops working after a while |
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On Fri, 11 Aug 2006 14:25:26 -0400 Mark Lord <lkml@rtr.ca> wrote:
> One of my notebooks (Dell Latitude X1) has a 1.1GHz Pentium-M ULV processor. > This chip can change CPU speeds from 600 -> 800 -> 1100 Mhz. > > I use speedstep-centrino with it, and after boot all is usually okay. > But after a few hours of operation, it stops shifting to the highest frequency > even under continuous 100% load (or not). Eventually it gets stuck at 600Mhz > and stays there until I reboot. > > Sometimes rebooting doesn't even restore it. > > /sys/devices/system/cpu/cpu0/cpufreq is all very normal looking, > showing the available frequencies and other info. All of the attribs > there look fine, except for "scaling_max_freq", which is what seems > to gradually get set smaller. For instance, right now it is set to 800000, > and it won't let me change it (echo 11000000 > scaling_max_freq has no effect. > > WHY?
cpufreq seems to have relatively frequent problems.
> And how can I fix it?
You could start by telling us which kernel versions are affected ;) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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